CVE-2025-21955

MEDIUM

Linux Kernel 5.15-6.6.83, 6.7-6.12.19, 6.13-6.13.7 - Use-After-Free in ksmbd Connection Release

Title source: llm

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: prevent connection release during oplock break notification ksmbd_work could be freed when after connection release. Increment r_count of ksmbd_conn to indicate that requests are not finished yet and to not release the connection.

References (4)

Core 4

Core References

Patch

https://git.kernel.org/stable/c/09aeab68033161cb54f194da93e51a11aee6144b

Patch

https://git.kernel.org/stable/c/a4261bbc33fbf99b99c80aa3a2c5097611802980

Patch

https://git.kernel.org/stable/c/f17d1c63a76b0fe8e9c78023a86507a3a6d62cfa

Patch

https://git.kernel.org/stable/c/3aa660c059240e0c795217182cf7df32909dd917

Scores

CVSS v3 5.5

EPSS 0.0019

EPSS Percentile 8.7%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Details

Status published

Products (15)

linux/Kernel 5.15.0 - 6.6.84linux

linux/Kernel 6.13.0 - 6.13.8linux

linux/Kernel 6.7.0 - 6.12.20linux

Linux/Linux < 5.15

Linux/Linux 0626e6641f6b467447c81dd7678a69c66f7746cf - 09aeab68033161cb54f194da93e51a11aee6144b

Linux/Linux 0626e6641f6b467447c81dd7678a69c66f7746cf - 3aa660c059240e0c795217182cf7df32909dd917

Linux/Linux 0626e6641f6b467447c81dd7678a69c66f7746cf - a4261bbc33fbf99b99c80aa3a2c5097611802980

Linux/Linux 0626e6641f6b467447c81dd7678a69c66f7746cf - f17d1c63a76b0fe8e9c78023a86507a3a6d62cfa

Linux/Linux 5.15

Linux/Linux 6.12.20 - 6.12.*

... and 5 more

Published Apr 01, 2025

Tracked Since Feb 18, 2026